Harrow



(ModeL) K. THARRALDSONQ;

HARROW.

Pafcerited Sept. 5, 1882.-

INVENTOR I ATTORNEYS.

UNITED STATES PATENT OFFICE.

KNUDE THARRALDSON, OF IDA GROVE, IOWA.

HARROW.

SPEGIFICATIONforming part of Letters Patent No. 263,994, dated September5, 1882.

Application filed June 26, 1882. (Model.)

means of cast-metal sockets and heads on the teeth, the said socketsbeing bolted on the under side of the bars of the harrow and holding theteeth by their heads on the sockets, whereby the boring ot' the bars isavoided, the expensive material of the teeth is economized, and bycontrivance of the shapes of the sockets and the heads of the teeth theteeth may be set in different positions for different kinds of work, allas hereinafter fully described.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional elevation of one of the bars of a harrow, alsoof my improved socket device for the connection of a harrowtooth, and aside elevation of the tooth. Fig. 2 is a similar view of the samedevices, the tooth being turned and set in a different position; andFig. 3 is a top view of the socket.

A represents one of the beams of a harrow, b the socket for theconnection of a harrowtooth, and c a tooth connected to the beam by thesocket. The socket is a simple casting, with flanges d for connection.to the under side of the beam A by the screws 0. The cavity for theheadfot' the tooth is square at the upper side of the socket; but theopening at the lower side is narrowed to the thickness of the body ofthe tooth below the head by the sloping wall 9 of the socket, while theoppo-' site wall, h, thereof is vertical. The head f of the tooth iswidened in one direction npward from its junction with the body of thetooth to the width of the top of the socketeavity, so that by placingthe tooth as represented in Fig. 1 it will assume a vertical positionwhen moving in the direction of the arrow, and by placing it as in Fig.2 the point will incline in the direction of the arrow of Fig. 1 andreversely to the arrow of Fig. 2.

It the direction of the harrow be reversed, with the tooth arranged asin Fig. 1, the slant toward the arrow of Fig. 1 will be still greaterthan in Fig. 2. Thus it will be seen that, besides the economy of metalof which the teeth are formed and the better mode of attaching theteeth, the plan enables the teeth to be shifted into several difierentpositions.

The sockets are to be fastened with screws, to be detached readily forshifting the teeth, which is done by taking them out of the sockets,turning them, and replacing them in said sockets.

I am aware that it is old, broadly, to employ a tooth having a wedgeaflixed to one side of its upper end to enable it to be arranged in aperpendicular or an inclined positioinas is also the employment of atooth having a head formed in two parts, having each an inclined and ahorizontal surface of contact to permit a like adjustment of the tooth.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patentp 1. The metal socket I), having beveled side 9and vertical side h,-in combination with a harrow-tooth, 0,-having headf, with two sides corresponding in size and shape to the space betweensaid sides 9 and h, substantially as described.

2. The metal socket I), having beveled side 9 and vertical side h, incombination with a harrow-tooth, 0, having head f, with two sidescorresponding in size and shape to the space between said sides 9 h, andother sides in conformity with the sides of the body of the tooth,substantially as described.

3. The combination, with the bar A and the tooth c of a harrow, ot' ametal socket, I), for attaching said tooth to the beam, the said socketand the head of the tooth being constructed and relatively arranged withrespect to their size and shape for shifting the positions orinclinations of the tooth, by shifting it around in said socket fromside to side, substantially as described.

KNUDE THARRALDSON.

Witnesses:

U. W. RoLmNs, P. H. HILMAN.

